#374582
Closest named color: Cobalt (#1E488F). oklch(41.1% 0.103 271.5), rgb(55, 69, 130).
Aa
White text reads best on this color (8.98:1).
About this color
#374582 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.103 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.033 away. White text reads best on it, at 8.98:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.33:1 |
| White text | 8.98:1 |
Values
| HEX | #374582 |
| RGB | rgb(55, 69, 130) |
| HSL | hsl(229, 41%, 36%) |
| OKLCH | oklch(41.1% 0.103 271.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #374582 | 8.98:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #374582 | 2.33:1 | Fails | Lc 13.5 | Not readable |
| #374582 text on white | 8.98:1 | AAA | Lc 90.5 | Preferred for body text |
| #374582 text on black | 2.33:1 | Fails | Lc -11.8 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F6
oklch(93.5% 0.018 272.3)
-
Step 200
200
#D1D8F0
oklch(88.4% 0.034 272.8)
-
Step 300
300
#B2BFE8
oklch(80.8% 0.06 271.2)
-
Step 400
400
#8B9DDD
oklch(70.7% 0.096 271.7)
-
Step 500
500
#6F84D4
oklch(63.2% 0.123 271.4)
-
Step 600
600
#586CC1
oklch(55.6% 0.134 271.5)
-
Step 700
700
#485AA7
oklch(49.2% 0.125 271.3)
-
Step 800
800 (this color)
#374582
oklch(41.1% 0.103 271.5)
-
Step 900
900
#323E6C
oklch(37.7% 0.08 271.1)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#374582 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #2A4D84 | 0.025 |
| Deuteranopia (no green cones) | #204681 | 0.026 |
| Tritanopia (no blue cones) | #0B525D | 0.091 |
| Achromatopsia (no color) | #494949 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374582
#374582
oklch(41.1% 0.103 271.5)
- #5B4800
#5B4800
oklch(41% 0.084 91.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #374582, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.033
- Dark Slate Blue #483D8B ΔE 0.036
- Light Navy #155084 ΔE 0.041
- Blueberry #464196 ΔE 0.042
- Dusk Blue #26538D ΔE 0.042
- Twilight Blue #0A437A ΔE 0.046
- Twilight #4E518B ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.054
Use #374582 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.